¹5, 2012

The possibility of modification of neodymium polybutadiene by copolymer of maleic anhydride and Ñ12–Ñ14 α-­olefin fraction is shown. The influence of modifier concentration on molecular characteristics and viscous properties of polymer has been studied

Co­polymerization of isobutylene with isoprene in methyl chloride in the presence of alkyl­chloride­modified aluminum­chloride­based catalyst system was studied. Increase of stability of butyl rubber dispersion in methyl chloride as well as better dispersion properties in presence of chlorinated isobutylene dimers and chlorinated propylene trimmers are shown by the method of molecular adsorption.

An attempt of introduction a maximum possible dosage of natural mineral compounds into latex was made for the first time to produce the composite materials based on NR latex. The aim is to provide the possibility to produce the rubber articles characterized by unique complex of properties.

Key words: shungite, NR latex, high filled composition materials.

Study of the Properties of Vulcanizates Based on the Modified Butadiene­Styrene Rubber – Kurbanova N.I., Seidov N.M. (P. 11).

The properties of vulcanizates based on the butadiene­styrene rubber modified and structured by trichloroacetic acid and also their binary blends with polyisoprene have been studied. Higher mechanical and processing parameters, adhesion strength and thermal stability of vulcanizates of chemical modification in comparison with vulcanizates of mechanical one have been shown.

The possibility of the use of N­carboxamides of cyclic imines as modifiers improving rubber­cord adhesion of rubber compounds (based on butadiene­methyl­styrene rubber) is studied. Vulcanization properties of modified compounds as well as some mechanical characteristics of vulcanizates (tensile strength, elongations at break and tear resistance) are presented.

Properties of the elastomer composites filled by nanoparticles of a mineral schungite, received on an original technique are presented. The increase in modules, strength, hardness, and uniformity of the received composites in comparison with composites filled by microparticles is shown.

Possibility of application of powdery cellulose fillers received from the waste of the textile industry directly in production of SBR is under consideration. Effect of these fillers on properties of vulcanizates is shown.

Processing of ålectroconductive carbon black production is reviewed. The phenomenological model of porosity change of carbon black particles is described taking the approach that the porosity is formed during oxidation of the particles with gases of full burning of hydrocarbons in a reactor. The equations connecting product properties and processing parameters are suggested. The equations of mathematical model of total process are presented and adequacy of them to experimental results is shown.

Monodisperse rubber powders with the predominant fraction of particles of 0.315­0.63 mm in size was prepared by the method of high­temperature shear deformation from EPDM rubbers with different content of paraffin oils. Grinding of rubbers results in formation of particles of core of high­density cross­linking, surrounded by a layer of low­density cross­linking. This gel fraction is of cross­linking density comparable with that of initial rubber.